/**
 * Version check module — checks npm registry for newer published versions.
 * Non-blocking, never throws. Caches results for 1 hour.
 */
export interface VersionInfo {
    current: string;
    latest: string;
    updateAvailable: boolean;
    releaseNotes?: string;
}
export interface UpdateState {
    previousVersion: string;
    updatedAt: string;
    updatedFrom: string;
    updatedTo: string;
}
/** Get the current installed version from package.json */
export declare function getCurrentVersion(): string;
/** Simple semver compare: returns true if latest > current */
export declare function isNewer(latest: string, current: string): boolean;
/** Count minor version gap (e.g., 0.28.7 → 0.30.0 = 2) */
export declare function minorVersionGap(latest: string, current: string): number;
/**
 * Check for available updates. Caches result for 1 hour.
 * Never throws — returns { updateAvailable: false } on any error.
 */
export declare function checkForUpdate(skipCache?: boolean): Promise<VersionInfo>;
/** Clear the cache (useful after an update) */
export declare function clearVersionCache(): void;
export interface ChangelogEntry {
    version: string;
    notes: string;
}
/** Read and parse the full CHANGELOG.md into entries (newest first). */
export declare function readChangelog(): ChangelogEntry[];
/** Save the current version before updating (for rollback) */
export declare function saveUpdateState(from: string, to: string): void;
/** Read the saved update state (for rollback) */
export declare function readUpdateState(): UpdateState | null;
/** Check if sudo is needed for global npm install */
export declare function needsSudo(): Promise<boolean>;
/** Run the npm install to update to a specific version */
export declare function performUpdate(version: string): Promise<{
    success: boolean;
    error?: string;
}>;
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